Colt (kōlt; 110), n. [OE. colt a young horse, ass, or camel, AS. colt; cf. dial. Sw. kullt a boy, lad.] 1. The young of the equine genus or horse kind of animals; — sometimes distinctively applied to the male, filly being the female. Cf. Foal.
☞ In sporting circles it is usual to reckon the age of colts from some arbitrary date, as from January 1, or May 1, next preceding the birth of the animal.
2. A young, foolish fellow. Shak.
3. A short knotted rope formerly used as an instrument of punishment in the navy. Ham. Nav. Encyc.
Colt's tooth, an imperfect or superfluous tooth in young horses. — To cast one's colt's tooth, to cease from youthful wantonness. “Your colt's tooth is not cast yet.” Shak. — To have a colt's tooth, to be wanton. Chaucer.